Journal
JOURNAL OF CRYSTAL GROWTH
Volume 334, Issue 1, Pages 177-180Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jcrysgro.2011.08.015
Keywords
Nanostructures; Nucleation; Molecular beam epitaxy; Semiconducting III-V materials
Funding
- Ministry of Science and Innovation of Spain [MAT2009-010350]
- French national research agency (ANR)
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The growth of GaN nanowires by means of plasma assisted molecular beam epitaxy directly on Si(111) has been investigated as a function of temperature. Statistical analysis of scanning electron microscopy pictures taken for different growth temperatures has revealed that density, diameter, length and length dispersion of nanowires were strongly dependent on temperature. Length dispersion, in particular, was found to be significant at high temperature. These features have been assigned to the different duration of the nucleation process with temperature, namely to the dependence with temperature of the time necessary for the size increase of the three-dimensional precursors up to a critical value. (C) 2011 Elsevier B.V. All rights reserved.
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